<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<style>
    div {
        align-self: center;
    }

    img {
        width: 91.5em;
        margin-left: 38px;
        position: fixed;
        cursor: pointer;
    }
</style>

<body>
    <div>
        <img src="img/banner.png" title="当当图书榜">
    </div>
</body>

</html>